Washington State defensive coordinator Mike Breske has been fired, a source told ESPN.com.
The Cougars ranked 98th in total defense (442 yards per game).
Linebackers coach Paul Volero was also fired, a source said.
Both Breske and Volero had been with head coach Mike Leach since he came to Washington State before the 2012 season.
The Cougars finished 3-9 overall and 2-7 in Pac-12 play, losing six of their final seven games.
Information from The Associated Press was used in this report.